JPS62228120A - Electronic balance with thermometer - Google Patents

Abstract

PURPOSE:To eliminate an entry mistake by dispensing with the manual work for recording temp. at the time of the drawing of data, by automatically performing the measurement of temp. along with the measurement of a wt. and selecting wt. and temp. measured values to print the selected one by a printer. CONSTITUTION:A change-over device 4 is closed to a B-side when temp. is measured. The environmental temp. in the vicinity of an article of which the wt. must the measured is detected by a temp. sensor 2 to be outputted to a voltage processing circuit 3. The analogue temp. signal from the voltage processing circuit 3 constituted of an operational amplifier and a resistor is converted to a digital signal by an A/D converter 5 to be inputted to a display device 6 and a printer 7. Because the signal showing that the change-over device 4 is closed to the B-side is inputted to the display device 6 and the printer 7, a measured value and a unit deg.C are displayed on the display device 6 and printed beside a wt. measured value previously printed by the printer 7.

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to improvements in electronic balances.

<Prior Art> When measuring the weight of an object using a balance, the temperature at the time of measurement is important depending on the object to be measured, and the temperature is recorded together with the measured weight.

On the other hand, in recent years, balances have become more automated and have become electronic, allowing measured values to be displayed digitally and printed out using a printer.

<Problems to be Solved by the Invention> Conventionally, temperature has been measured by reading a thermometer visually and manually writing the temperature data next to the printed weight data. In addition, in order to print temperature data along with ff1ffl data using a printer, place a high-grade digital thermometer near the balance, switch between weight data from the balance and temperature data from the temperature needle, and input the data to the printer.
Weight data and temperature data are printed.

However, in the former case, errors in reading or writing the thermometer occur, and the process is complicated because it requires manual labor. Also, the latter requires expensive equipment.

Means for Solving Problems> The electronic balance with a thermometer according to the present invention includes a temperature sensor that detects the temperature of the environment, and an analog temperature signal corresponding to the temperature based on the output of the temperature sensor. The apparatus includes a temperature signal output means, a conversion means for selectively converting the temperature signal and a weight signal indicating a measured value of weight into digital signals, and a printing means to which the output of the conversion means is applied.

Effects> With the above configuration, the present invention converts the M strain signal and the temperature signal into digital signals using a conversion means in common, and uses the obtained digital signal to print weight and temperature information using the printing means. Print the measured value.

<Example> The drawing shows the configuration of an electronic balance with a thermometer according to this example. 1
2 is a temperature sensor, 3 is a voltage processing circuit,
4 is a switch, 5 is an A/D converter, 6 is a display, 7 is a printer, and 8 is a power source.

The hail distortion section 1 outputs an analog weight signal indicating the weight of an object to be measured (not shown). The temperature sensor 2 detects the temperature of the environment, such as in the vicinity of the object to be measured. Voltage processing circuit 3
Based on the output of the temperature sensor 2, outputs an analog temperature signal corresponding to the temperature and adapted to the input voltage of the A/D converter 5. The switch 4 is connected to the hail distortion section 1
The weight signal from the voltage processing circuit 3 and the temperature signal from the voltage processing circuit 3 are selectively switched and input to the A/D converter 5. The A/D converter 5 converts the heavy metal signal and the temperature signal into digital signals. The printer 7 prints the weight and temperature measurement data as digital values based on the digital signals from the A/D converter 5.

The operation will be explained below.

During weight measurement, the switch 4 is closed to the A side, and the weight signal from the hail distortion section 1 is converted into a digital signal by the A/D converter 5 and input to the display 6 and printer 7.

At this time, the switch 4 is set to A for the display 6 and the printer.
Since a signal indicating that it is closed is input to the side,
The display 6 displays the weight measurement value and the weight unit g based on the digital signal from the A/D converter 5, and the printer 7 prints the weight measurement value and the weight unit g on paper.

On the other hand, when measuring temperature, the switch 4 is closed to the B side, and the temperature signal from the voltage processing circuit 3 is converted into a digital signal by the A/D converter 5 and input to the display 6 and printer. At this time, a signal indicating that the switch 4 is closed to the B side is input to the display 6 and the printer, so the display 6 displays the temperature based on the digital signal from the A/D converter 5. The temperature unit °C is displayed together with the measured temperature value, and the printer 7 prints this temperature measurement value and the unit °C next to the previously printed weight measurement value.

Electric power is supplied to the hail strain section 1 and the temperature sensor 2 from a power source 8. The voltage processing circuit 3 is composed of one inexpensive operational amplifier and several resistors.

In the example above, the weight and temperature are switched manually, but normally the temperature is displayed and it is automatically determined that the object to be measured is placed on the hail strain area. Sometimes it is also possible to display the weight. Also,
It is also possible to switch between weight and temperature by printing the temperature manually after printing the amount M, and furthermore, it is also possible to set the switching method in advance.

<Effects of the Invention> As explained above, in the present invention, the temperature is automatically measured as well as the weight, and the temperature measurement value is printed along with the m port, making it easier to read the conventional thermometer. This eliminates mistakes and errors in writing temperature measurements, and also eliminates the manual work required to record temperatures. Furthermore, since only a few parts need to be added to the electronic balance, an inexpensive electronic balance with a thermometer can be realized.

[Brief explanation of drawings]

The drawing is a block diagram showing the configuration of an embodiment of the present invention.

Claims (1)

[Claims] A weight signal output means for outputting an analog weight signal indicating the weight of the object to be measured, a temperature sensor for detecting the temperature of the environment, and a temperature sensor for outputting an analog temperature signal corresponding to the temperature based on the output of the temperature sensor. A signal output means, a conversion means for converting an analog signal into a digital signal, a printing means for printing the measured value as a digital value, and a selection means for selecting the weight signal and the temperature signal and inputting them to the conversion means. An electronic balance with a thermometer, comprising: selectively converting a weight signal and a temperature signal into digital signals and inputting the digital signals to the printing means.